I swear if someone produced a nice leather / ballistic nylon cover that had a lightweight metal face (insert) to protect the screen, they would make a fortune.
The screen on the DX is so vulnerable, yet no case manufacturers seem to care. My Octovo case for my K2 is as close to a trustworthy cover I've ever found for a Kindle. I currently have the Timbuk2 case for my KDX graphite, and it doesn't instill confidence with respect to protecting the screen.
It's just a fabric cover with no rigid screen protection.
Everyone on Amazon seems to clamor for a rigid screen protection case. Guess I just have to open my own case business to produce one...Hmm...